body,
ol,
ul,
li,
h1,
h2,
h3,
h4,
h5,
h6,
p,
th,
td,
dl,
dd,
form,
fieldset,
legend,
input,
textarea,
select {
    margin: 0;
    padding: 0;
    line-height: 1;
    box-sizing: border-box;
    user-select: none;
}

body {
    font: 12px "宋体", "Arial Narrow", HELVETICA;
    background: #fff;
    -webkit-text-size-adjust: 100%
}

a {
    color: #172c45;
    text-decoration: none
}

a:hover {
    color: #cd0200;
    text-decoration: underline
}

em {
    font-style: normal
}

li {
    list-style: none
}

img {
    border: 0;
    vertical-align: middle
}

table {
    border-collapse: collapse;
    border-spacing: 0
}

p {
    word-wrap: break-word
}

body {
    background: #ebebeb;
}

.bd {
    border: 1px solid;
}

.bdb {
    border-bottom: 1px solid #ebebeb;
}

.ovh {
    overflow: hidden;
}

.h100pc {
    height: 100%;
}

.w100pc {
    width: 100%;
}

.dsn {
    display: none;
}

.fixed {
    position: fixed;
}

.rel {
    position: relative;
}

.abs {
    position: absolute;
}

.tac {
    text-align: center;
}

.lh15 {
    line-height: 1.5;
}


/* 颜色 */

.f999 {
    color: #999;
}

.f666 {
    color: #666;
}

.f333 {
    color: #333;
}

.fff {
    color: #ffffff;
}


/* 背景颜色 */

.bg-green {
    background: green;
}

.bg-gray {
    background: gray;
}

.bg-fff {
    background: #ffffff;
}


/* 弹性盒子公共样式 */


/* 排列方向-横向排列 */

.flex {
    display: flex;
}


/* 纵向排列 */

.flex2 {
    display: flex;
    flex-direction: column;
}


/* 水平居中,垂直居中 */

.fcc {
    display: flex;
    justify-content: center;
    align-items: center;
}


/* 两端对齐 */

.jc-sb {
    justify-content: space-between;
}


/* 分散对齐 */

.jc-sa {
    justify-content: space-around;
}

.jc-c {
    justify-content: center;
}

.jc-e {
    justify-content: flex-end;
}


/* 垂直居中 */

.aic {
    align-items: center;
}


/* 分配剩余空间 */

.fg1 {
    flex-grow: 1;
}

.fg2 {
    flex-grow: 2;
}


/* 字体设置 */

.f0 {
    font-size: 0px
}

.f8 {
    font-size: 8px
}

.f10 {
    font-size: 10px
}

.f12 {
    font-size: 12px
}

.f14 {
    font-size: 14px
}

.f16 {
    font-size: 16px
}

.f18 {
    font-size: 18px
}

.f20 {
    font-size: 20px
}

.f22 {
    font-size: 22px
}

.f24 {
    font-size: 24px
}

.f26 {
    font-size: 26px
}


/* margin-top设置 */

.mt-5 {
    margin-top: 5px;
}

.mt-10 {
    margin-top: 10px;
}

.mt-15 {
    margin-top: 15px;
}

.mt-20 {
    margin-top: 20px;
}

.mt-25 {
    margin-top: 25px;
}

.mt-30 {
    margin-top: 30px;
}


/* margin-bottom设置 */

.mb-5 {
    margin-bottom: 5px;
}

.mb-10 {
    margin-bottom: 10px;
}

.mb-15 {
    margin-bottom: 15px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mb-25 {
    margin-bottom: 25px;
}

.mb-30 {
    margin-bottom: 30px;
}


/* margin-left设置 */

.ml-5 {
    margin-left: 5px;
}

.ml-10 {
    margin-left: 10px;
}

.ml-15 {
    margin-left: 15px;
}

.ml-20 {
    margin-left: 20px;
}

.ml-25 {
    margin-left: 25px;
}

.ml-30 {
    margin-left: 30px;
}


/* margin-right设置 */

.mr-5 {
    margin-right: 5px;
}

.mr-10 {
    margin-right: 10px;
}

.mr-15 {
    margin-right: 15px;
}

.mr-20 {
    margin-right: 20px;
}

.mr-25 {
    margin-right: 25px;
}

.mr-30 {
    margin-right: 30px;
}


/* padding-top设置 */

.pt-5 {
    padding-top: 5px;
}

.pt-10 {
    padding-top: 10px;
}

.pt-15 {
    padding-top: 15px;
}

.pt-20 {
    padding-top: 20px;
}

.pt-25 {
    padding-top: 25px;
}

.pt-30 {
    padding-top: 30px;
}


/* padding-bottom设置 */

.pb-5 {
    padding-bottom: 5px;
}

.pb-10 {
    padding-bottom: 10px;
}

.pb-15 {
    padding-bottom: 15px;
}

.pb-20 {
    padding-bottom: 20px;
}

.pb-25 {
    padding-bottom: 25px;
}

.pb-30 {
    padding-bottom: 30px;
}


/* padding-left设置 */

.pl-5 {
    padding-left: 5px;
}

.pl-10 {
    padding-left: 10px;
}

.pl-15 {
    padding-left: 15px;
}

.pl-20 {
    padding-left: 20px;
}

.pl-25 {
    padding-left: 25px;
}

.pl-30 {
    padding-left: 30px;
}


/* padding-right设置 */

.pr-5 {
    padding-right: 5px;
}

.pr-10 {
    padding-right: 10px;
}

.pr-15 {
    padding-right: 15px;
}

.pr-20 {
    padding-right: 20px;
}

.pr-25 {
    padding-right: 25px;
}

.pr-30 {
    padding-right: 30px;
}

header {
    display: flex;
    font-size: 20px;
    justify-content: space-around;
    align-items: center;
    height: 50px;
    background-color: #fff;
    width: 100%;
}

.btn {
    display: inline-block;
    margin-bottom: 0;
    font-weight: 400;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    -ms-touch-action: manipulation;
    touch-action: manipulation;
    cursor: pointer;
    background-image: none;
    border: 1px solid transparent;
    padding: 6px 12px;
    font-size: 14px;
    line-height: 1.42857143;
    border-radius: 4px;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    width: 80%;
    font: 20px;
    color: #fff;
    background-color: #337ab7;
}